The CO2 reforming of CH4 over Ni/La2O3/alpha-Al2O3 catalysts: The effect of La2O3 contents on the kinetic performance
文献类型：期刊论文
| 作者 | Cui, Yuehua; Zhang, Huidong; Xu, Hengyong; Li, Wenzhao |
| 刊名 | applied catalysis a-general
 |
| 出版日期 | 2007 |
| 卷号 | 331页码:60-69 |
| 关键词 | kinetics reforming CH4 CO2 Ni/La2O3/U-Al2O3 |
| 英文摘要 | the aim of this work is to quantitatively investigate the effect of la2o3 contents on the intrinsic activity of ni active sites for the co2 reforming of ch4 on ni/la2o3 (1, 2, 4, and 6 wt%)/alpha-al2o3 catalysts using steady and pulse kinetic methods. the ni particle sizes were decreased with increasing la,03 contents. and the 4-la catalyst had the most ni-h species. the ni active sites on the 4-la catalyst showed the highest reforming activity and the lowest activation energy. among ch4, co2, co, and h-2, only ch4 reaction orders were not zero and they were affected by the la2o3 contents. in 550-600 degrees c, the ch4 dissociation is a rate-determining step for the reforming reaction on the ni/la2o3/alpha-al2o3 catalysts. the 4-la catalyst gave the highest reforming activity because the ch4 dissociation was a structure sensitive reaction and 4-la catalyst has the most suitable ni particle size. in 650-750 degrees c, the ch4 dissociation and the formation of ni-h reached equilibration and the reaction between chx species with la2o2co3 became the rate-determining step. the 4-la catalyst with the most ni-h could keep the highest x value of chx intermediates, leading to the highest reforming activity in 650-750 degrees c. therefore, the la2o3 contents on the catalysts tuned the ni particle sizes and ni-h amounts on the catalysts, which lead to higher reforming activity on the 4-la catalyst. (c) 2007 elsevier b.v. all rights reserved. |
| WOS标题词 | science & technology ; physical sciences ; life sciences & biomedicine |
| 类目[WOS] | chemistry, physical ; environmental sciences |
| 研究领域[WOS] | chemistry ; environmental sciences & ecology |
| 关键词[WOS] | carbon-dioxide ; synthesis gas ; ni/la2o3 catalyst ; nickel-catalysts ; ni/al2o3 catalysts ; ni catalysts ; methane ; syngas ; ni/alpha-al2o3 ; temperature |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000250510100009 |
| 公开日期 | 2015-11-17 |
| 源URL | [http://159.226.238.44/handle/321008/140671]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 作者单位 | Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cui, Yuehua,Zhang, Huidong,Xu, Hengyong,et al. The CO2 reforming of CH4 over Ni/La2O3/alpha-Al2O3 catalysts: The effect of La2O3 contents on the kinetic performance[J]. applied catalysis a-general,2007,331:60-69. |
| APA | Cui, Yuehua,Zhang, Huidong,Xu, Hengyong,&Li, Wenzhao.(2007).The CO2 reforming of CH4 over Ni/La2O3/alpha-Al2O3 catalysts: The effect of La2O3 contents on the kinetic performance.applied catalysis a-general,331,60-69. |
| MLA | Cui, Yuehua,et al."The CO2 reforming of CH4 over Ni/La2O3/alpha-Al2O3 catalysts: The effect of La2O3 contents on the kinetic performance".applied catalysis a-general 331(2007):60-69. |
入库方式： OAI收割
来源：大连化学物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。